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authorHeiko Carstens <heiko.carstens@de.ibm.com>2008-02-05 10:50:45 -0500
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2008-02-05 10:50:59 -0500
commita3afe70b83fdbbd4d757d2911900d168bc798a31 (patch)
tree405a30094891841b884dc81b440d121a4f201bf2 /arch
parent67fe9251bba510572feb6c3357636148bbd17e30 (diff)
[S390] latencytop s390 support.
Cc: Holger Wolf <wolf@linux.vnet.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/s390/Kconfig3
-rw-r--r--arch/s390/kernel/stacktrace.c31
2 files changed, 26 insertions, 8 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index f0e7ccf1b206..92a4f7b4323a 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -16,6 +16,9 @@ config LOCKDEP_SUPPORT
16config STACKTRACE_SUPPORT 16config STACKTRACE_SUPPORT
17 def_bool y 17 def_bool y
18 18
19config HAVE_LATENCYTOP_SUPPORT
20 def_bool y
21
19config RWSEM_GENERIC_SPINLOCK 22config RWSEM_GENERIC_SPINLOCK
20 bool 23 bool
21 24
diff --git a/arch/s390/kernel/stacktrace.c b/arch/s390/kernel/stacktrace.c
index da6924729964..85e46a5d0e08 100644
--- a/arch/s390/kernel/stacktrace.c
+++ b/arch/s390/kernel/stacktrace.c
@@ -14,7 +14,8 @@
14static unsigned long save_context_stack(struct stack_trace *trace, 14static unsigned long save_context_stack(struct stack_trace *trace,
15 unsigned long sp, 15 unsigned long sp,
16 unsigned long low, 16 unsigned long low,
17 unsigned long high) 17 unsigned long high,
18 int savesched)
18{ 19{
19 struct stack_frame *sf; 20 struct stack_frame *sf;
20 struct pt_regs *regs; 21 struct pt_regs *regs;
@@ -47,10 +48,12 @@ static unsigned long save_context_stack(struct stack_trace *trace,
47 return sp; 48 return sp;
48 regs = (struct pt_regs *)sp; 49 regs = (struct pt_regs *)sp;
49 addr = regs->psw.addr & PSW_ADDR_INSN; 50 addr = regs->psw.addr & PSW_ADDR_INSN;
50 if (!trace->skip) 51 if (savesched || !in_sched_functions(addr)) {
51 trace->entries[trace->nr_entries++] = addr; 52 if (!trace->skip)
52 else 53 trace->entries[trace->nr_entries++] = addr;
53 trace->skip--; 54 else
55 trace->skip--;
56 }
54 if (trace->nr_entries >= trace->max_entries) 57 if (trace->nr_entries >= trace->max_entries)
55 return sp; 58 return sp;
56 low = sp; 59 low = sp;
@@ -66,15 +69,27 @@ void save_stack_trace(struct stack_trace *trace)
66 orig_sp = sp & PSW_ADDR_INSN; 69 orig_sp = sp & PSW_ADDR_INSN;
67 new_sp = save_context_stack(trace, orig_sp, 70 new_sp = save_context_stack(trace, orig_sp,
68 S390_lowcore.panic_stack - PAGE_SIZE, 71 S390_lowcore.panic_stack - PAGE_SIZE,
69 S390_lowcore.panic_stack); 72 S390_lowcore.panic_stack, 1);
70 if (new_sp != orig_sp) 73 if (new_sp != orig_sp)
71 return; 74 return;
72 new_sp = save_context_stack(trace, new_sp, 75 new_sp = save_context_stack(trace, new_sp,
73 S390_lowcore.async_stack - ASYNC_SIZE, 76 S390_lowcore.async_stack - ASYNC_SIZE,
74 S390_lowcore.async_stack); 77 S390_lowcore.async_stack, 1);
75 if (new_sp != orig_sp) 78 if (new_sp != orig_sp)
76 return; 79 return;
77 save_context_stack(trace, new_sp, 80 save_context_stack(trace, new_sp,
78 S390_lowcore.thread_info, 81 S390_lowcore.thread_info,
79 S390_lowcore.thread_info + THREAD_SIZE); 82 S390_lowcore.thread_info + THREAD_SIZE, 1);
83}
84
85void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace)
86{
87 unsigned long sp, low, high;
88
89 sp = tsk->thread.ksp & PSW_ADDR_INSN;
90 low = (unsigned long) task_stack_page(tsk);
91 high = (unsigned long) task_pt_regs(tsk);
92 save_context_stack(trace, sp, low, high, 0);
93 if (trace->nr_entries < trace->max_entries)
94 trace->entries[trace->nr_entries++] = ULONG_MAX;
80} 95}